Response of Polyester-Viscose Ring and MJS Yarns to Heat Treatment under Relaxed Condition.

A study examined the rigidity of commonly used polyester/viscose yarns and the influence of heat treatment on blended yarn properties. Heat treatment caused significant decreases in the flexural rigidity of MJS yarns. Yarns with higher linear density or higher polyester content and yarns manufactured at lower speeds experienced greater de..

Compact Spinning -- An Improvement of Ring Spinning in the Long-Staple Range.

Ring spinning machines modified with compact spinning components ensure yarn quality during the spinning of long staple fibers into fine yarns. A fourth pair of rollers follows a three roller double apron drafting mechanism. After the drafted sliver leaves the third pair of rollers, it rests on an apron driven by the fourth pair of roller..

Setting Practical Scientific Criteria for Cotton Fiber Selection and Blending.

The basic assumption of a fiber selection process that a uniform fiber blend always produces a uniform yarn is unproven. Classical theoretical discussions suggest that the extent of randomness in fiber distribution determines the variability in the number of fibers per yarn cross section. A random distribution of a fiber quality in the bl..

Count Variation Control -- A New Look.

Count variations in yarn arise from drawing, blow room processing, and spinning. Drawing accounts for 50 percent of the variation and blow room processing accounts for 13 percent. The quality of the raw material also plays a decisive role in yarn quality and count variation. Improved process controls in opening, efficient fiber control du..

Sliver Cans -- An Influencing Factor of Yarn Quality.

Because of the potential for damage to the product, mill engineers must carefully consider the design of yarn storage, handling, and transportation systems in yarn manufacturing plants. Assessment of materials handling problems at spinning mills involves a comparison of the yarn from the top and bottom of existing sliver cans and an exami..

A Study on Stores Consumption in Spinning Mills.

Cost control of stored consumable materials is an important factor in optimizing total spinning mill costs. Yarn quality depends on the timely replacement of such consumable stores as cots, aprons, spindle tapes, and metallic wires. A study of stores consumption in 120 Indian textile mills showed that high productivity mills tended to rep..

Dry Spinning of Cellulose Triacetate Filament Yarns from an Acetone Solution.

Research at Asahi Chemical Industry Company focused on the dry extrusion of cellulose triacetate filament yarns in a solution of acetone. Experiments cooled the mixture of cellulose triacetate and acetone to minus 70 degrees centigrade and then heated the mixture to 50 degrees centigrade with stirring to prepare a stable extrusion solutio..

The Effect of Preparation on the Spinning Quality of Cotton.

Cotton that is classified as rough preparation, or Prep, contains curled or napped lumps and results from wet harvesting, gleaning, other unusual handling conditions, or poor ginning. Historically, cotton designated Prep has low market value. To determine whether cottons classified for rough or abnormal preparation process differently tha..

Influence of fibre diameter and medullation on woollen spun yarns and their products

The influence of fibre diameter and medullation on mechanical processing and quality performance of yarns, blankets and carpets has been studied. The correlation coefficients between fibre diameter, medullation and properties of yarns, blankets and carpets are presented. The multiple regression, equations for yarn, blanket and carpet prop..

Choosing the right top for spinning

This paper introduces a prediction tool - Sirolan-Yarnspec - which can be used in electing tops which will meet the spinner's needs. Yarnspec allows the user to gauge expected spinning performance and yarn properties for any given pure wool worsted yarn. The improved understanding of how similar spinning performance can be achieved with d..